As far as stats go, I'm seeing some encouraging trends. Cinccino usage is down about 1.5% from last month (still not where it should be) and Slowking and Abomasnow look like they might finally drop after UU stole them from us. Fingers crossed for next month.

There are practically no changes in usage. Big surprise, Garchomp and Landorus-T are top of the list again followed by the same pretty much 10 Pokemon (except Tornadus jumped in use ALOT). Oh well. Maybe one day my mixed tier team will be fully recognized in the OU.

Explorer

Dear UU,
Please give up on Vaporeon and Milotic. They are outclassed by other things most of the time, and they need to drop to RU where they'll actually be good. Thank you.

Dear RU,
Please give up on Ambipom and Cinccino. They are outclassed by other things in literally every scenario, and they need to drop to NU where they'll actually be good. Thank you.

Dear RU,
Please give up on Typhlosion. It is outclassed by other things in literally every scenario, and it needs to drop despite being banned in NU to encourage bad players to stop using it. Thank you.

Dear RU,
Please give up on Trevenant. It is outclassed by other things in literally every scenario, and it needs to drop to NU where it will still be outclassed by all of Torterra, Gourgeist, Roselia, Cacturne and Misdreavus anyway. Thank you.

Dear future NU,
Please give up on Trevenant as soon as you get it. It is outclassed by other things in almost every scenario, and it needs to drop so that it can rot at the bottom of the PU viability rankings. Thank you.

edit:
Dear OU,
Please give up on Sylveon and Conkeldurr. They are noticably less consistent than a number of other Pokémon - including a number of UU and BL 'mons - and are not good on a wide enough range of teams to justify their levels of usage. Thank you.

Dear UU,
Please give up on Vaporeon and Milotic. They are outclassed by other things most of the time, and they need to drop to RU where they'll actually be good. Thank you.

Dear RU,
Please give up on Ambipom and Cinccino. They are outclassed by other things in literally every scenario, and they need to drop to NU where they'll actually be good. Thank you.

Dear RU,
Please give up on Typhlosion. It is outclassed by other things in literally every scenario, and it needs to drop despite being banned in NU to encourage bad players to stop using it. Thank you.

Dear RU,
Please give up on Trevenant. It is outclassed by other things in literally every scenario, and it needs to drop to NU where it will still be outclassed by all of Torterra, Gourgeist, Roselia, Cacturne and Misdreavus anyway. Thank you.

Dear future NU,
Please give up on Trevenant as soon as you get it. It is outclassed by other things in almost every scenario, and it needs to drop so that it can rot at the bottom of the PU viability rankings. Thank you.

PU: stop using avalugg, torkoal, electrode, marowak, frogadier, lapras and whirlipede, and start using vigoroth, regice, sawsbuck, simisage, and venipede; all of the former group suck and all of the latter group are very good

Sadly, getting tiers to lose shitmons takes a lot of effort. It took a long while for UU to lose Scrafty and slightly longer than that for RU to lose Hitmonchan. Besides, a lot of low ladder players DO have an effect on usage, the solution to this is use higher usage stats, but even then this doesn't guarantee the loss of bad Pokemon. (Especially for Typhlosion, in which due to the fact that you can only use Typh in RU noobs used it because its Typhlosion and not because of its viability. Typh had a good deal of usage in RU before being banned in NU, so comparing it to the likes of Throh being banned from PU and being worthless in NU and Venomoth being shit in OU even with QuiverPass as a thing (Before Speed + Attack buffs were banned with Baton Pass thus freeing Venomoth and Smeargle), as these Pokemon had no usage in the only tiers they could be used (IIRC))

(I guess its back to "DON'T USE (SHITMON)" set names like what RU did when Hitmonchan and Claydol were plaguing the tier, but Vaporeon in UU for instance isn't really Hitmonchan in RU-levels bad so not a 100% fair/unbiased solution, but it will result in usage loss so there's that)

Edit: As for Ambipom, its niche being Fake Out and being an offensive Normal-type are hard to replicate, especially the latter since the only viable alternative is Zangoose (Exploud's a special attacker while Ambi is a physical one) which is like C+ lol. (Maybe to show how bad Normal-types are in a meta run by the likes of Scrafty (who ironically enough was a shitmon in its original tier), Mega Steelix, Tyrantrum, and plenty of others) And as for Fake Out any viable mon that has it has MUCH better alternatives. These two "niches" however are the reasons people even use the stupid thing to begin with. That and what Toljik said applies as well.